// const minus = require('./lib/minus.js')
// const{add} = require('./lib/add.js')
import cheng from './lib/cheng.js'
import test,{chu} from './lib/chu.js'

// console.log(add(1,2))
// console.log(minus(2,1))
// console.log(cheng(2,1))
console.log(chu(10,2))
test()
